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	When I started my Ph.D. studies back in 2008, I couldn't imagine how to ever
	write a thesis; it seemed to be an impossible endeavor. It is the great support
	from many people that contributed to making it possible.
	 
	When we have the opportunity to thank, we can't forget any person that help us
	in some way. I will try to do that. During my Ph.D. I had really nice and
	lovely people around me, mainly those ones that really carry about me in good
	and bad moments. I thank for the ``gifts'' (that ones you feel) and
	unforgetable moments were passed near them. I found new friends and
	rediscovered old ones. These things, only a God that do loves you can provide.
	
	I am grateful to my supervisor Martin Musicante not only for the ongoing
	support but also for believing in me during this time and the opportunities he
	provided for my growth as a researcher. I deeply thank my co-reviewer Genoveva
	Vargas-Solar for the time and effort spent on my thesis and for the feedback
	when I was in Mexico and France, and even by many emails and meetings by
	conference when I came back to Brazil. I also would like to thank Valeria de
	Castro for your patience and suggestions given for my work, and friendship
	during the short time we had contact. I hope to cooperate with everyone for a
	long time, because I know that many fruits can be harvested yet.
	
	I was pleased to be part of the HADAS team for 9 months and meet people
	who I will always remember with nostalgia and affection, in particular Juan
	Carlos, Mohamad Othman, Epal Orleans, Carlos Manuel (Manolo), Lourdez
	Martinez, Christiane Kamdem, Leon Fopa and Javier Espinosa. Thanks for the
	friendship. I hope to have the opportunity to meet everyone again. 
	
	I am deeply grateful to Marinas Praia Sul Presbyterian Church (IPMPS) members
	for their support, prayers and love of each one. Those who are always by my
	side, I thank the church members on behalf of Rev. Edinaldo Melo, Henrique
	Louren\'co and Jos\'e Martins.

	My family has been my greatest supporter over the last 29 years. My mom Ana
	Sueli is the coolest mother I can imagine and I am deeply grateful for
	everything she did for me! I hope that I will be such a good father too. My
	father Francisco Ednaldo and my sister Tatyanny always took care and pray for
	me, thanks for being there!
	
	Last but not least, I am very happy to have my own little family that strongly
	supported me in the Ph.D. studies. My wife Ana Fl\'avia always behind me, even
	during the countless weekends in the office, and the 9 months I spent in
	Grenoble for my Ph.D. stage. I am very thankful for her help and the
	appreciation in dificult times. My son Lucas Kauai has been the sunshine in my life for the
	last 2 years. I am not able to measure the love I feel for them, not only for
	what they have done for me, but for what they are and represents in my life. I
	love you two with all my heart. 
	
	Thank you so much! 
	


	 
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